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Linux/arch/sparc/math-emu/sfp-util_64.h

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  1 /* SPDX-License-Identifier: GPL-2.0 */
  2 /*
  3  * arch/sparc64/math-emu/sfp-util.h
  4  *
  5  * Copyright (C) 1999 Jakub Jelinek (jj@ultra.linux.cz)
  6  * Copyright (C) 1999 David S. Miller (davem@redhat.com)
  7  *
  8  */
  9 
 10 #include <linux/kernel.h>
 11 #include <linux/sched.h>
 12 #include <linux/types.h>
 13 #include <asm/byteorder.h>
 14 
 15 #define add_ssaaaa(sh, sl, ah, al, bh, bl)      \
 16   __asm__ ("addcc %4,%5,%1\n\t"                 \
 17            "add %2,%3,%0\n\t"                   \
 18            "bcs,a,pn %%xcc, 1f\n\t"             \
 19            "add %0, 1, %0\n"                    \
 20            "1:"                                 \
 21            : "=r" (sh),                         \
 22              "=&r" (sl)                         \
 23            : "r" ((UDItype)(ah)),               \
 24              "r" ((UDItype)(bh)),               \
 25              "r" ((UDItype)(al)),               \
 26              "r" ((UDItype)(bl))                \
 27            : "cc")
 28            
 29 #define sub_ddmmss(sh, sl, ah, al, bh, bl)      \
 30   __asm__ ("subcc %4,%5,%1\n\t"                 \
 31            "sub %2,%3,%0\n\t"                   \
 32            "bcs,a,pn %%xcc, 1f\n\t"             \
 33            "sub %0, 1, %0\n"                    \
 34            "1:"                                 \
 35            : "=r" (sh),                         \
 36              "=&r" (sl)                         \
 37            : "r" ((UDItype)(ah)),               \
 38              "r" ((UDItype)(bh)),               \
 39              "r" ((UDItype)(al)),               \
 40              "r" ((UDItype)(bl))                \
 41            : "cc")
 42 
 43 #define umul_ppmm(wh, wl, u, v)                         \
 44   do {                                                  \
 45           UDItype tmp1, tmp2, tmp3, tmp4;               \
 46           __asm__ __volatile__ (                        \
 47                    "srl %7,0,%3\n\t"                    \
 48                    "mulx %3,%6,%1\n\t"                  \
 49                    "srlx %6,32,%2\n\t"                  \
 50                    "mulx %2,%3,%4\n\t"                  \
 51                    "sllx %4,32,%5\n\t"                  \
 52                    "srl %6,0,%3\n\t"                    \
 53                    "sub %1,%5,%5\n\t"                   \
 54                    "srlx %5,32,%5\n\t"                  \
 55                    "addcc %4,%5,%4\n\t"                 \
 56                    "srlx %7,32,%5\n\t"                  \
 57                    "mulx %3,%5,%3\n\t"                  \
 58                    "mulx %2,%5,%5\n\t"                  \
 59                    "sethi %%hi(0x80000000),%2\n\t"      \
 60                    "addcc %4,%3,%4\n\t"                 \
 61                    "srlx %4,32,%4\n\t"                  \
 62                    "add %2,%2,%2\n\t"                   \
 63                    "movcc %%xcc,%%g0,%2\n\t"            \
 64                    "addcc %5,%4,%5\n\t"                 \
 65                    "sllx %3,32,%3\n\t"                  \
 66                    "add %1,%3,%1\n\t"                   \
 67                    "add %5,%2,%0"                       \
 68            : "=r" (wh),                                 \
 69              "=&r" (wl),                                \
 70              "=&r" (tmp1), "=&r" (tmp2), "=&r" (tmp3), "=&r" (tmp4) \
 71            : "r" ((UDItype)(u)),                        \
 72              "r" ((UDItype)(v))                         \
 73            : "cc");                                     \
 74   } while (0)
 75   
 76 #define udiv_qrnnd(q, r, n1, n0, d)                     \
 77   do {                                                  \
 78     UWtype __d1, __d0, __q1, __q0, __r1, __r0, __m;     \
 79     __d1 = (d >> 32);                                   \
 80     __d0 = (USItype)d;                                  \
 81                                                         \
 82     __r1 = (n1) % __d1;                                 \
 83     __q1 = (n1) / __d1;                                 \
 84     __m = (UWtype) __q1 * __d0;                         \
 85     __r1 = (__r1 << 32) | (n0 >> 32);                   \
 86     if (__r1 < __m)                                     \
 87       {                                                 \
 88         __q1--, __r1 += (d);                            \
 89         if (__r1 >= (d)) /* i.e. we didn't get carry when adding to __r1 */ \
 90           if (__r1 < __m)                               \
 91             __q1--, __r1 += (d);                        \
 92       }                                                 \
 93     __r1 -= __m;                                        \
 94                                                         \
 95     __r0 = __r1 % __d1;                                 \
 96     __q0 = __r1 / __d1;                                 \
 97     __m = (UWtype) __q0 * __d0;                         \
 98     __r0 = (__r0 << 32) | ((USItype)n0);                \
 99     if (__r0 < __m)                                     \
100       {                                                 \
101         __q0--, __r0 += (d);                            \
102         if (__r0 >= (d))                                \
103           if (__r0 < __m)                               \
104             __q0--, __r0 += (d);                        \
105       }                                                 \
106     __r0 -= __m;                                        \
107                                                         \
108     (q) = (UWtype) (__q1 << 32)  | __q0;                \
109     (r) = __r0;                                         \
110   } while (0)
111 
112 #define UDIV_NEEDS_NORMALIZATION 1  
113 
114 #define abort() \
115         return 0
116 
117 #ifdef __BIG_ENDIAN
118 #define __BYTE_ORDER __BIG_ENDIAN
119 #else
120 #define __BYTE_ORDER __LITTLE_ENDIAN
121 #endif
122 

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